LAS VEGAS — Following his subpar Las Vegas NBA Summer League debut Friday, Los Angeles Lakers rookie point guard Lonzo Ball said there was nowhere to go but up.

He said that performance — 2 for 15 shooting — would probably be his worst game of the week.

In his second Summer League game, Ball went up. He finished with 11 points, 11 rebounds, 11 assists and four turnovers in 34 minutes in the Lakers’ 86-81 loss to the Boston Celtics on Saturday.

Lakers President Magic Johnson and general manager Rob Pelinka again watched from court-side seats, not far from boxer Floyd Mayweather who showed up to watch Ball play for the second consecutive night.